A limbus vertebra is a bone tubercle formed by bone trauma on a vertebral body, bearing a radiographic similarity to a vertebral fracture. The anterior-superior corner of a single vertebra is the common site for this defect although it can also be seen at the inferior corner as well as the posterior or anterior margin. Anatomically, it is assumed to be an intra-vertebral body herniation of the disc material occurring during adolescent growth spurt when the ring apophysis has not yet fused. It was first described by Schmorl in 1927 and later in detail by Leif Sward and Adad Baranto.